21288930

素因数分解:

$2^1\times 3^1\times 5^1\times {\mathrm{13}}^3\times {\mathrm{17}}^1\times {\mathrm{19}}^1$

素因数の和:85

約数の個数: 128

約数和(自身を含む): 61689600

約数和(自身を除く): 40400670

約数列:

[1, 2, 3, 5, 6, 10, 13, 15, 17, 19, 26, 30, 34, 38, 39, 51, 57, 65, 78, 85, 95, 102, 114, 130, 169, 170, 190, 195, 221, 247, 255, 285, 323, 338, 390, 442, 494, 507, 510, 570, 646, 663, 741, 845, 969, 1014, 1105, 1235, 1326, 1482, 1615, 1690, 1938, 2197, 2210, 2470, 2535, 2873, 3211, 3230, 3315, 3705, 4199, 4394, 4845, 5070, 5746, 6422, 6591, 6630, 7410, 8398, 8619, 9633, 9690, 10985, 12597, 13182, 14365, 16055, 17238, 19266, 20995, 21970, 25194, 28730, 32110, 32955, 37349, 41743, 41990, 43095, 48165, 54587, 62985, 65910, 74698, 83486, 86190, 96330, 109174, 112047, 125229, 125970, 163761, 186745, 208715, 224094, 250458, 272935, 327522, 373490, 417430, 545870, 560235, 626145, 709631, 818805, 1120470, 1252290, 1419262, 1637610, 2128893, 3548155, 4257786, 7096310, 10644465, 21288930]

約数ペア:

[(1, 21288930), (2, 10644465), (3, 7096310), (5, 4257786), (6, 3548155), (10, 2128893), (13, 1637610), (15, 1419262), (17, 1252290), (19, 1120470), (26, 818805), (30, 709631), (34, 626145), (38, 560235), (39, 545870), (51, 417430), (57, 373490), (65, 327522), (78, 272935), (85, 250458), (95, 224094), (102, 208715), (114, 186745), (130, 163761), (169, 125970), (170, 125229), (190, 112047), (195, 109174), (221, 96330), (247, 86190), (255, 83486), (285, 74698), (323, 65910), (338, 62985), (390, 54587), (442, 48165), (494, 43095), (507, 41990), (510, 41743), (570, 37349), (646, 32955), (663, 32110), (741, 28730), (845, 25194), (969, 21970), (1014, 20995), (1105, 19266), (1235, 17238), (1326, 16055), (1482, 14365), (1615, 13182), (1690, 12597), (1938, 10985), (2197, 9690), (2210, 9633), (2470, 8619), (2535, 8398), (2873, 7410), (3211, 6630), (3230, 6591), (3315, 6422), (3705, 5746), (4199, 5070), (4394, 4845)]