20987172

素因数分解:

$2^2\times 3^2\times {\mathrm{19}}^1\times {\mathrm{61}}^1\times {\mathrm{503}}^1$

素因数の和:593

約数の個数: 72

約数和(自身を含む): 56871360

約数和(自身を除く): 35884188

約数列:

[1, 2, 3, 4, 6, 9, 12, 18, 19, 36, 38, 57, 61, 76, 114, 122, 171, 183, 228, 244, 342, 366, 503, 549, 684, 732, 1006, 1098, 1159, 1509, 2012, 2196, 2318, 3018, 3477, 4527, 4636, 6036, 6954, 9054, 9557, 10431, 13908, 18108, 19114, 20862, 28671, 30683, 38228, 41724, 57342, 61366, 86013, 92049, 114684, 122732, 172026, 184098, 276147, 344052, 368196, 552294, 582977, 1104588, 1165954, 1748931, 2331908, 3497862, 5246793, 6995724, 10493586, 20987172]

約数ペア:

[(1, 20987172), (2, 10493586), (3, 6995724), (4, 5246793), (6, 3497862), (9, 2331908), (12, 1748931), (18, 1165954), (19, 1104588), (36, 582977), (38, 552294), (57, 368196), (61, 344052), (76, 276147), (114, 184098), (122, 172026), (171, 122732), (183, 114684), (228, 92049), (244, 86013), (342, 61366), (366, 57342), (503, 41724), (549, 38228), (684, 30683), (732, 28671), (1006, 20862), (1098, 19114), (1159, 18108), (1509, 13908), (2012, 10431), (2196, 9557), (2318, 9054), (3018, 6954), (3477, 6036), (4527, 4636)]