21411860

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{29}}^2\times {\mathrm{67}}^1$

素因数の和:153

約数の個数: 72

約数和(自身を含む): 49751520

約数和(自身を除く): 28339660

約数列:

[1, 2, 4, 5, 10, 19, 20, 29, 38, 58, 67, 76, 95, 116, 134, 145, 190, 268, 290, 335, 380, 551, 580, 670, 841, 1102, 1273, 1340, 1682, 1943, 2204, 2546, 2755, 3364, 3886, 4205, 5092, 5510, 6365, 7772, 8410, 9715, 11020, 12730, 15979, 16820, 19430, 25460, 31958, 36917, 38860, 56347, 63916, 73834, 79895, 112694, 147668, 159790, 184585, 225388, 281735, 319580, 369170, 563470, 738340, 1070593, 1126940, 2141186, 4282372, 5352965, 10705930, 21411860]

約数ペア:

[(1, 21411860), (2, 10705930), (4, 5352965), (5, 4282372), (10, 2141186), (19, 1126940), (20, 1070593), (29, 738340), (38, 563470), (58, 369170), (67, 319580), (76, 281735), (95, 225388), (116, 184585), (134, 159790), (145, 147668), (190, 112694), (268, 79895), (290, 73834), (335, 63916), (380, 56347), (551, 38860), (580, 36917), (670, 31958), (841, 25460), (1102, 19430), (1273, 16820), (1340, 15979), (1682, 12730), (1943, 11020), (2204, 9715), (2546, 8410), (2755, 7772), (3364, 6365), (3886, 5510), (4205, 5092)]