21115691075

素因数分解:

$5^2\times {\mathrm{17}}^2\times {\mathrm{23}}^1\times {\mathrm{31}}^1\times {\mathrm{4099}}^1$

素因数の和:4197

約数の個数: 72

約数和(自身を含む): 29967129600

約数和(自身を除く): 8851438525

約数列:

[1, 5, 17, 23, 25, 31, 85, 115, 155, 289, 391, 425, 527, 575, 713, 775, 1445, 1955, 2635, 3565, 4099, 6647, 7225, 8959, 9775, 12121, 13175, 17825, 20495, 33235, 44795, 60605, 69683, 94277, 102475, 127069, 166175, 206057, 223975, 303025, 348415, 471385, 635345, 1030285, 1184611, 1602709, 1742075, 2160173, 2356925, 2922587, 3176725, 5151425, 5923055, 8013545, 10800865, 14612935, 27246053, 29615275, 36722941, 40067725, 49683979, 54004325, 73064675, 136230265, 183614705, 248419895, 681151325, 844627643, 918073525, 1242099475, 4223138215, 21115691075]

約数ペア:

[(1, 21115691075), (5, 4223138215), (17, 1242099475), (23, 918073525), (25, 844627643), (31, 681151325), (85, 248419895), (115, 183614705), (155, 136230265), (289, 73064675), (391, 54004325), (425, 49683979), (527, 40067725), (575, 36722941), (713, 29615275), (775, 27246053), (1445, 14612935), (1955, 10800865), (2635, 8013545), (3565, 5923055), (4099, 5151425), (6647, 3176725), (7225, 2922587), (8959, 2356925), (9775, 2160173), (12121, 1742075), (13175, 1602709), (17825, 1184611), (20495, 1030285), (33235, 635345), (44795, 471385), (60605, 348415), (69683, 303025), (94277, 223975), (102475, 206057), (127069, 166175)]