20878340

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{47}}^1\times {\mathrm{167}}^1$

素因数の和:249

約数の個数: 96

約数和(自身を含む): 54190080

約数和(自身を除く): 33311740

約数列:

[1, 2, 4, 5, 7, 10, 14, 19, 20, 28, 35, 38, 47, 70, 76, 94, 95, 133, 140, 167, 188, 190, 235, 266, 329, 334, 380, 470, 532, 658, 665, 668, 835, 893, 940, 1169, 1316, 1330, 1645, 1670, 1786, 2338, 2660, 3173, 3290, 3340, 3572, 4465, 4676, 5845, 6251, 6346, 6580, 7849, 8930, 11690, 12502, 12692, 15698, 15865, 17860, 22211, 23380, 25004, 31255, 31396, 31730, 39245, 44422, 54943, 62510, 63460, 78490, 88844, 109886, 111055, 125020, 149131, 156980, 219772, 222110, 274715, 298262, 444220, 549430, 596524, 745655, 1043917, 1098860, 1491310, 2087834, 2982620, 4175668, 5219585, 10439170, 20878340]

約数ペア:

[(1, 20878340), (2, 10439170), (4, 5219585), (5, 4175668), (7, 2982620), (10, 2087834), (14, 1491310), (19, 1098860), (20, 1043917), (28, 745655), (35, 596524), (38, 549430), (47, 444220), (70, 298262), (76, 274715), (94, 222110), (95, 219772), (133, 156980), (140, 149131), (167, 125020), (188, 111055), (190, 109886), (235, 88844), (266, 78490), (329, 63460), (334, 62510), (380, 54943), (470, 44422), (532, 39245), (658, 31730), (665, 31396), (668, 31255), (835, 25004), (893, 23380), (940, 22211), (1169, 17860), (1316, 15865), (1330, 15698), (1645, 12692), (1670, 12502), (1786, 11690), (2338, 8930), (2660, 7849), (3173, 6580), (3290, 6346), (3340, 6251), (3572, 5845), (4465, 4676)]