21988548

素因数分解:

$2^2\times 3^2\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{61}}^1$

素因数の和:138

約数の個数: 144

約数和(自身を含む): 64995840

約数和(自身を除く): 43007292

約数列:

[1, 2, 3, 4, 6, 9, 12, 17, 18, 19, 31, 34, 36, 38, 51, 57, 61, 62, 68, 76, 93, 102, 114, 122, 124, 153, 171, 183, 186, 204, 228, 244, 279, 306, 323, 342, 366, 372, 527, 549, 558, 589, 612, 646, 684, 732, 969, 1037, 1054, 1098, 1116, 1159, 1178, 1292, 1581, 1767, 1891, 1938, 2074, 2108, 2196, 2318, 2356, 2907, 3111, 3162, 3477, 3534, 3782, 3876, 4148, 4636, 4743, 5301, 5673, 5814, 6222, 6324, 6954, 7068, 7564, 9333, 9486, 10013, 10431, 10602, 11346, 11628, 12444, 13908, 17019, 18666, 18972, 19703, 20026, 20862, 21204, 22692, 30039, 32147, 34038, 35929, 37332, 39406, 40052, 41724, 59109, 60078, 64294, 68076, 71858, 78812, 90117, 96441, 107787, 118218, 120156, 128588, 143716, 177327, 180234, 192882, 215574, 236436, 289323, 323361, 354654, 360468, 385764, 431148, 578646, 610793, 646722, 709308, 1157292, 1221586, 1293444, 1832379, 2443172, 3664758, 5497137, 7329516, 10994274, 21988548]

約数ペア:

[(1, 21988548), (2, 10994274), (3, 7329516), (4, 5497137), (6, 3664758), (9, 2443172), (12, 1832379), (17, 1293444), (18, 1221586), (19, 1157292), (31, 709308), (34, 646722), (36, 610793), (38, 578646), (51, 431148), (57, 385764), (61, 360468), (62, 354654), (68, 323361), (76, 289323), (93, 236436), (102, 215574), (114, 192882), (122, 180234), (124, 177327), (153, 143716), (171, 128588), (183, 120156), (186, 118218), (204, 107787), (228, 96441), (244, 90117), (279, 78812), (306, 71858), (323, 68076), (342, 64294), (366, 60078), (372, 59109), (527, 41724), (549, 40052), (558, 39406), (589, 37332), (612, 35929), (646, 34038), (684, 32147), (732, 30039), (969, 22692), (1037, 21204), (1054, 20862), (1098, 20026), (1116, 19703), (1159, 18972), (1178, 18666), (1292, 17019), (1581, 13908), (1767, 12444), (1891, 11628), (1938, 11346), (2074, 10602), (2108, 10431), (2196, 10013), (2318, 9486), (2356, 9333), (2907, 7564), (3111, 7068), (3162, 6954), (3477, 6324), (3534, 6222), (3782, 5814), (3876, 5673), (4148, 5301), (4636, 4743)]